SENSORLESS CONTROL OF A TRAPEZOIDAL BRUSHLESS DC MOTOR USING THE TMS320C25 DSP

This application report presents the theory and practice of implementing a closed-loop sensorless commutation scheme for a trapezoidal brushless DC motor. The implementation consists of a PC-hosted Texas Instruments (TITM) TMS320C25 digital signal processor (DSP).

The TMS320C25 functions as a coprocessor running an algorithm to determine the phase voltage switching points. This solution uses the DSP as an alternative to the bulky, temperature sensitive, hall-effect sensors traditionally used. The proposed future works suggests the algorithms successfully used with the TMS320C25 may yield even faster sampling rates with use of TI's TMS320C30 DSP.

This document was part of the first European DSP Education and Research Conference that took place September 26 and 27, 1996 in Paris. For information on how TI encourages students from around the world to find innovative ways to use DSPs, see TI's World Wide Web site at www.ti.com.

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.

(c) Copyright 1998 Texas Instruments Incorporated. All rights reserved.
Trademarks, Important Notice!